How Do You Calculate Vector Addition and Subtraction?

[mikeyp]

Homework Statement

Vector a has a magnitude of 4.3 m and is directed east. Vector b has a magnitude of 3.9 m and is directed 35° west of north. What are (a) the magnitude and (b) the direction (from east) of a + b ? What are (c) the magnitude and (d) the direction (from east) of b - a? Round your angles to the nearest degree.

Homework Equations

socahtoa? a^2+b^2=c^2
sin(35)*3.9/4.3

The Attempt at a Solution

sin(35)*3.9/4.3

 

[berkeman]

Homework Statement

Vector a has a magnitude of 4.3 m and is directed east. Vector b has a magnitude of 3.9 m and is directed 35° west of north. What are (a) the magnitude and (b) the direction (from east) of a + b ? What are (c) the magnitude and (d) the direction (from east) of b - a? Round your angles to the nearest degree.

Homework Equations

socahtoa? a^2+b^2=c^2
sin(35)*3.9/4.3

The Attempt at a Solution

sin(35)*3.9/4.3

Welcome to the PF,

On vector questions like this, it is helpful to draw a diagram showing the vectors and their addition/subtraction. Can you draw the diagrams and scan/upload them?